I am having troubles with Zend_Gdata API for google spreadsheets queries.
I want to perform a query returning every empty value of a given column/field.
My code:
$query = new Zend_Gdata_Spreadsheets_ListQuery();
$query->setSpreadsheetKey($this->spreadsheetKey);
$query->setWorksheetId($this->worksheetId);
$query->setSpreadsheetQuery('FIELD!=""');
$feed = $this->spreadsheetService->getListFeed($query);
If I perform the same operation with this url:
http://spreadsheets.google.com/feeds/list/KEY/oda/private/full?sq=FIELD!=""
I obtain the desired output.
Any idea?